import Vue from 'vue'
// 挂载VueRouter()构造函数
import VueRouter from 'vue-router'
// 导入 登录页面 组件
import Login from '../components/Login.vue'
// 导入 后台主页 组件
import Home from '../components/Home.vue'
import Welcome from '../components/Welcome.vue'
// 导入用户列表组件
import Users from '../components/user/Users.vue'
import Rights from '../components/power/Rights.vue'
import Roles from '../components/power/Roles.vue'
import Cate from '../components/goods/Cate.vue'
import Params from '../components/goods/Params.vue'
import GoodsList from '../components/goods/List.vue'
import Add from '../components/goods/Add.vue'
import Order from '../components/order/Order.vue'
import Report from '../components/report/Report.vue'

Vue.use(VueRouter)

const router = new VueRouter({
  routes: [
    { path: '/', redirect: '/login' },
    { path: '/login', component: Login },
    {
      path: '/home',
      component: Home,
      redirect: 'welcome',
      children: [
        // home的子路由规则
        { path: '/welcome', component: Welcome },
        { path: '/users', component: Users },
        { path: '/rights', component: Rights },
        { path: '/roles', component: Roles },
        { path: '/categories', component: Cate },
        { path: '/params', component: Params },
        { path: '/goods', component: GoodsList },
        { path: '/goods/add', component: Add },
        { path: '/orders', component: Order },
        { path: '/reports', component: Report }
      ]
    }
  ]
})

// 挂载路由导航守卫       (用于在url地址栏输入地址访问时，做身份的验证)
router.beforeEach((to, from, next) => {
  // to将要访问的路径  from代表从哪个路径跳转过来  next()表示放行
  if (to.path === '/login') return next()
  // 获取token
  const tokenStr = window.sessionStorage.getItem('token')
  if (!tokenStr) return next('/login')
  // 如果有客户端token，把请求放行
  next()
})

// 暴露路由实例对象
export default router
